691934 has 16 divisors (see below), whose sum is σ = 1124928. Its totient is φ = 317952.

The previous prime is 691931. The next prime is 691949. The reversal of 691934 is 439196.

It is a self number, because there is not a number n which added to its sum of digits gives 691934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1382 + ... + 1814.

It is an arithmetic number, because the mean of its divisors is an integer number (70308).

2⁶⁹¹⁹³⁴ is an apocalyptic number.

691934 is a deficient number, since it is larger than the sum of its proper divisors (432994).

691934 is a wasteful number, since it uses less digits than its factorization.

691934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499.

The product of its digits is 5832, while the sum is 32.

The square root of 691934 is about 831.8257028969. The cubic root of 691934 is about 88.4480421075.

The spelling of 691934 in words is "six hundred ninety-one thousand, nine hundred thirty-four".